Consider a bond with the following features and a hypothetical settlement date of 10 October 2019.

Annual Coupon	5%
Coupon Payment Frequency	Semiannual
Interest Payment Dates	30 December and 30 June
Maturity Date	30 December 2020
Day-Count Convention	30/360
Annual Yield-to-Maturity	6%

Now, considering the convexity effect, what is the approximate percentage price change if the bond's yield to maturity decreases by 50 basis points. Use the formula that relies on approximate modified duration and approximate convexity. Round your answer to three decimal places and express your answer in percentage terms (e.g., 3.500% not 0.035).